Table 3 Subgroup comparison of radiographic parameters

Lenke classification (1/2/3)

10/4/3

18/12/10

–

Riser sign

2.47 ± 1.23

2.90 ± 1.46

0.294

Apical vertebra rotation (Nash-Moe)

1.71 ± 0.47

1.60 ± 0.67

0.558

Convex-Bending Cobb angle (°)

27.12 ± 5.48

31.53 ± 7.33

0.804

Flexibility (%)

51 ± 4

42 ± 8

<0.0001

Preoperative MT Cobb angle (°)

55.82 ± 10.48

54.98 ± 12.23

0.804

Postoperative MT Cobb angle (°)

17.88 ± 7.53

14.83 ± 7.59

0.169

Change in MT Cobb angle (°)

37.94 ± 9.65

40.15 ± 8.28

0.384

MT curve correction (%)

68 ± 13

74 ± 10

0.079

Preoperative TK (T5–T12; °)

5.18 ± 3.28

4.58 ± 3.54

0.552

Postoperative TK (T5–T12; °)

23.41 ± 3.20

14.70 ± 3.22

<0.0001

Change in TK (T5–T12; °)

18.24 ± 4.05

10.13 ± 3.99

<0.0001

Preoperative LL (L1–S1; °)

−45.76 ± 9.68

−48.80 ± 9.33

0.271

Postoperative LL (L1–S1; °)

−50.82 ± 8.75

−51.35 ± 8.49

0.833

Change in LL (L1–S1; °)

−5.06 ± 13.51

−2.55 ± 10.35

0.449